Ewald tessef



UNITED STATES PATENT OFFICE.

EWALD TESSEN, OF ROSTOCK, GERMANY.

METHOD OF MANUFACTURING ELASTIC GLUE OR GELATINE.

SPECIFICATION forming part of Letters Patent No. 505,615, datedSeptember 26, 1893.

Application filed July 15, 1893. Serial No. 480,654. (No specimens.)

To all whom it may concern.-

Be it known that I, EwALD TESSEN, a subject of the Grand Duke ofMecklenburg- Schwerin, and a resident of Rostock, in the Grand Duchy ofMecklenburgschwerin, German Empire, have invented a new and ImprovedMethod of Manufacturing Elastic Glue or-Gelatine, of which the followingis a full, clear, and exact specification.

My invention has for its object to produce an elastic and durable glueor gelatinewhich is especially qualified for addition to color, so as toform glue-water-color. Oolors containing my improved glue areeffectively prevented from shivering off and splitting as well as fromany decomposition, in consequence whereof these colors are very durable.

The characteristic feature of my'inethod consists in adding hydrate ofpotash to the glue or gelatine, which addition on one side prevents theintrusion of bacteria into the glue, on the other causes the fatcontained in the glue, to be saponified. Further I add to said gluecontaining hydrate of potash a weak potash-soap, which, as well known,is very soft and imparts to the glue a lasting elasticity and toughness.Finally I employ chloride of magnesium as addition to the glue forpreparing glue-water-color. The chloride of magnesium has the propertyto attract humidity from the air and thereby to effect, that the colorcontaining a small addition of chloride of magnesium does not dryperfectly and keeps therefore a constant elasticity.

The manufacture of gelatine or glue according to my method isthefollowing: Two hundred kilograms of glue are soaked in water, so thatthe water is perfectly sucked up by the glue. On the other side twohundred kilograms of water are heated to 190 Fahrenheit and mixed withfive kilograms of a lye of hydrate of potash of 40" Baum during constantstirring. Thereafter this diluted lye is added to the said quantity ofglue and this composition is again heated to 19Q Fahrenheit. To this hotgelatine there are added one hundred kilograms of dry chloride ofmagnesium, until the latter is perfectly dissolved. Besidesthis,'thirty-two kilograms of linseed-oil are weakly saponified withseven kilograms of hydrate of potash of 40 Baum in cold way to such adegree, that no oil remains on the surface. This latter mass is likewiseadded to the above said hot gelatine or glue composition and intimatelymixed therewith.

The glue prepared inthis manner shows the above mentioned properties andis exceedingly well adapted for the manufacture of glue-water-color.

What I claim, and desire to secure by Letters Patent of the UnitedStates, is-- The method of manufacturing elastic glue or gelatine,consisting in first heating the glue and saponifying the fat of the sameby adding hydrate of potash, then adding dry chloride of magnesium andfinally treating this mixture with potash-soap, substantially asdescribed and for the purpose set forth.

In testimony whereof I have signed this specification in the presence oftwo subscribing witnesses.

EWALD TESSEN.

lVitnesses:

R. HERPIOH, E. SoHULrzn.

